21 research outputs found
Mechanism of Absorption Wavelength Shift of Bacteriorhodopsin During Photocycle
Bacteriorhodopsin, a light-driven proton pump, alters
the absorption
wavelengths in the range of 410–617 nm during the photocycle.
Here, we report the absorption wavelengths, calculated using 12 bacteriorhodopsin
crystal structures (including the BR, BR13‑cis, J, K0, KE, KL, L, M, N,
and O state structures) and a combined quantum mechanical/molecular
mechanical/polarizable continuum model (QM/MM/PCM) approach. The QM/MM/PCM
calculations reproduced the experimentally measured absorption wavelengths
with a standard deviation of 4 nm. The shifts in the absorption wavelengths
can be explained mainly by the following four factors: (i) retinal
Schiff base deformation/twist induced by the protein environment,
leading to a decrease in the electrostatic interaction between the
protein environment and the retinal Schiff base; (ii) changes in the
protonation state of the protein environment, directly altering the
electrostatic interaction between the protein environment and the
retinal Schiff base; (iii) changes in the protonation state; or (iv)
isomerization of the retinal Schiff base, where the absorption wavelengths
of the isomers originally differ
Mechanism of Absorption Wavelength Shift of Bacteriorhodopsin During Photocycle
Bacteriorhodopsin, a light-driven proton pump, alters
the absorption
wavelengths in the range of 410–617 nm during the photocycle.
Here, we report the absorption wavelengths, calculated using 12 bacteriorhodopsin
crystal structures (including the BR, BR13‑cis, J, K0, KE, KL, L, M, N,
and O state structures) and a combined quantum mechanical/molecular
mechanical/polarizable continuum model (QM/MM/PCM) approach. The QM/MM/PCM
calculations reproduced the experimentally measured absorption wavelengths
with a standard deviation of 4 nm. The shifts in the absorption wavelengths
can be explained mainly by the following four factors: (i) retinal
Schiff base deformation/twist induced by the protein environment,
leading to a decrease in the electrostatic interaction between the
protein environment and the retinal Schiff base; (ii) changes in the
protonation state of the protein environment, directly altering the
electrostatic interaction between the protein environment and the
retinal Schiff base; (iii) changes in the protonation state; or (iv)
isomerization of the retinal Schiff base, where the absorption wavelengths
of the isomers originally differ
Mechanism of Absorption Wavelength Shift of Bacteriorhodopsin During Photocycle
Bacteriorhodopsin, a light-driven proton pump, alters
the absorption
wavelengths in the range of 410–617 nm during the photocycle.
Here, we report the absorption wavelengths, calculated using 12 bacteriorhodopsin
crystal structures (including the BR, BR13‑cis, J, K0, KE, KL, L, M, N,
and O state structures) and a combined quantum mechanical/molecular
mechanical/polarizable continuum model (QM/MM/PCM) approach. The QM/MM/PCM
calculations reproduced the experimentally measured absorption wavelengths
with a standard deviation of 4 nm. The shifts in the absorption wavelengths
can be explained mainly by the following four factors: (i) retinal
Schiff base deformation/twist induced by the protein environment,
leading to a decrease in the electrostatic interaction between the
protein environment and the retinal Schiff base; (ii) changes in the
protonation state of the protein environment, directly altering the
electrostatic interaction between the protein environment and the
retinal Schiff base; (iii) changes in the protonation state; or (iv)
isomerization of the retinal Schiff base, where the absorption wavelengths
of the isomers originally differ
Mechanism of Absorption Wavelength Shift of Bacteriorhodopsin During Photocycle
Bacteriorhodopsin, a light-driven proton pump, alters
the absorption
wavelengths in the range of 410–617 nm during the photocycle.
Here, we report the absorption wavelengths, calculated using 12 bacteriorhodopsin
crystal structures (including the BR, BR13‑cis, J, K0, KE, KL, L, M, N,
and O state structures) and a combined quantum mechanical/molecular
mechanical/polarizable continuum model (QM/MM/PCM) approach. The QM/MM/PCM
calculations reproduced the experimentally measured absorption wavelengths
with a standard deviation of 4 nm. The shifts in the absorption wavelengths
can be explained mainly by the following four factors: (i) retinal
Schiff base deformation/twist induced by the protein environment,
leading to a decrease in the electrostatic interaction between the
protein environment and the retinal Schiff base; (ii) changes in the
protonation state of the protein environment, directly altering the
electrostatic interaction between the protein environment and the
retinal Schiff base; (iii) changes in the protonation state; or (iv)
isomerization of the retinal Schiff base, where the absorption wavelengths
of the isomers originally differ
Mechanism of Absorption Wavelength Shift of Bacteriorhodopsin During Photocycle
Bacteriorhodopsin, a light-driven proton pump, alters
the absorption
wavelengths in the range of 410–617 nm during the photocycle.
Here, we report the absorption wavelengths, calculated using 12 bacteriorhodopsin
crystal structures (including the BR, BR13‑cis, J, K0, KE, KL, L, M, N,
and O state structures) and a combined quantum mechanical/molecular
mechanical/polarizable continuum model (QM/MM/PCM) approach. The QM/MM/PCM
calculations reproduced the experimentally measured absorption wavelengths
with a standard deviation of 4 nm. The shifts in the absorption wavelengths
can be explained mainly by the following four factors: (i) retinal
Schiff base deformation/twist induced by the protein environment,
leading to a decrease in the electrostatic interaction between the
protein environment and the retinal Schiff base; (ii) changes in the
protonation state of the protein environment, directly altering the
electrostatic interaction between the protein environment and the
retinal Schiff base; (iii) changes in the protonation state; or (iv)
isomerization of the retinal Schiff base, where the absorption wavelengths
of the isomers originally differ
Mechanism of Absorption Wavelength Shift of Bacteriorhodopsin During Photocycle
Bacteriorhodopsin, a light-driven proton pump, alters
the absorption
wavelengths in the range of 410–617 nm during the photocycle.
Here, we report the absorption wavelengths, calculated using 12 bacteriorhodopsin
crystal structures (including the BR, BR13‑cis, J, K0, KE, KL, L, M, N,
and O state structures) and a combined quantum mechanical/molecular
mechanical/polarizable continuum model (QM/MM/PCM) approach. The QM/MM/PCM
calculations reproduced the experimentally measured absorption wavelengths
with a standard deviation of 4 nm. The shifts in the absorption wavelengths
can be explained mainly by the following four factors: (i) retinal
Schiff base deformation/twist induced by the protein environment,
leading to a decrease in the electrostatic interaction between the
protein environment and the retinal Schiff base; (ii) changes in the
protonation state of the protein environment, directly altering the
electrostatic interaction between the protein environment and the
retinal Schiff base; (iii) changes in the protonation state; or (iv)
isomerization of the retinal Schiff base, where the absorption wavelengths
of the isomers originally differ
Mechanism of Absorption Wavelength Shift of Bacteriorhodopsin During Photocycle
Bacteriorhodopsin, a light-driven proton pump, alters
the absorption
wavelengths in the range of 410–617 nm during the photocycle.
Here, we report the absorption wavelengths, calculated using 12 bacteriorhodopsin
crystal structures (including the BR, BR13‑cis, J, K0, KE, KL, L, M, N,
and O state structures) and a combined quantum mechanical/molecular
mechanical/polarizable continuum model (QM/MM/PCM) approach. The QM/MM/PCM
calculations reproduced the experimentally measured absorption wavelengths
with a standard deviation of 4 nm. The shifts in the absorption wavelengths
can be explained mainly by the following four factors: (i) retinal
Schiff base deformation/twist induced by the protein environment,
leading to a decrease in the electrostatic interaction between the
protein environment and the retinal Schiff base; (ii) changes in the
protonation state of the protein environment, directly altering the
electrostatic interaction between the protein environment and the
retinal Schiff base; (iii) changes in the protonation state; or (iv)
isomerization of the retinal Schiff base, where the absorption wavelengths
of the isomers originally differ
Mechanism of Absorption Wavelength Shift of Bacteriorhodopsin During Photocycle
Bacteriorhodopsin, a light-driven proton pump, alters
the absorption
wavelengths in the range of 410–617 nm during the photocycle.
Here, we report the absorption wavelengths, calculated using 12 bacteriorhodopsin
crystal structures (including the BR, BR13‑cis, J, K0, KE, KL, L, M, N,
and O state structures) and a combined quantum mechanical/molecular
mechanical/polarizable continuum model (QM/MM/PCM) approach. The QM/MM/PCM
calculations reproduced the experimentally measured absorption wavelengths
with a standard deviation of 4 nm. The shifts in the absorption wavelengths
can be explained mainly by the following four factors: (i) retinal
Schiff base deformation/twist induced by the protein environment,
leading to a decrease in the electrostatic interaction between the
protein environment and the retinal Schiff base; (ii) changes in the
protonation state of the protein environment, directly altering the
electrostatic interaction between the protein environment and the
retinal Schiff base; (iii) changes in the protonation state; or (iv)
isomerization of the retinal Schiff base, where the absorption wavelengths
of the isomers originally differ
Mechanism of Absorption Wavelength Shift of Bacteriorhodopsin During Photocycle
Bacteriorhodopsin, a light-driven proton pump, alters
the absorption
wavelengths in the range of 410–617 nm during the photocycle.
Here, we report the absorption wavelengths, calculated using 12 bacteriorhodopsin
crystal structures (including the BR, BR13‑cis, J, K0, KE, KL, L, M, N,
and O state structures) and a combined quantum mechanical/molecular
mechanical/polarizable continuum model (QM/MM/PCM) approach. The QM/MM/PCM
calculations reproduced the experimentally measured absorption wavelengths
with a standard deviation of 4 nm. The shifts in the absorption wavelengths
can be explained mainly by the following four factors: (i) retinal
Schiff base deformation/twist induced by the protein environment,
leading to a decrease in the electrostatic interaction between the
protein environment and the retinal Schiff base; (ii) changes in the
protonation state of the protein environment, directly altering the
electrostatic interaction between the protein environment and the
retinal Schiff base; (iii) changes in the protonation state; or (iv)
isomerization of the retinal Schiff base, where the absorption wavelengths
of the isomers originally differ
Mechanism of Absorption Wavelength Shift of Bacteriorhodopsin During Photocycle
Bacteriorhodopsin, a light-driven proton pump, alters
the absorption
wavelengths in the range of 410–617 nm during the photocycle.
Here, we report the absorption wavelengths, calculated using 12 bacteriorhodopsin
crystal structures (including the BR, BR13‑cis, J, K0, KE, KL, L, M, N,
and O state structures) and a combined quantum mechanical/molecular
mechanical/polarizable continuum model (QM/MM/PCM) approach. The QM/MM/PCM
calculations reproduced the experimentally measured absorption wavelengths
with a standard deviation of 4 nm. The shifts in the absorption wavelengths
can be explained mainly by the following four factors: (i) retinal
Schiff base deformation/twist induced by the protein environment,
leading to a decrease in the electrostatic interaction between the
protein environment and the retinal Schiff base; (ii) changes in the
protonation state of the protein environment, directly altering the
electrostatic interaction between the protein environment and the
retinal Schiff base; (iii) changes in the protonation state; or (iv)
isomerization of the retinal Schiff base, where the absorption wavelengths
of the isomers originally differ